1/*
2 * da9063-core.c: Device access for Dialog DA9063 modules
3 *
4 * Copyright 2012 Dialog Semiconductors Ltd.
5 * Copyright 2013 Philipp Zabel, Pengutronix
6 *
7 * Author: Krystian Garbaciak, Dialog Semiconductor
8 * Author: Michal Hajduk, Dialog Semiconductor
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/slab.h>
21#include <linux/device.h>
22#include <linux/delay.h>
23#include <linux/interrupt.h>
24#include <linux/mutex.h>
25#include <linux/mfd/core.h>
26#include <linux/regmap.h>
27
28#include <linux/mfd/da9063/core.h>
29#include <linux/mfd/da9063/pdata.h>
30#include <linux/mfd/da9063/registers.h>
31
32#include <linux/proc_fs.h>
33#include <linux/kthread.h>
34#include <linux/uaccess.h>
35
36
37static struct resource da9063_regulators_resources[] = {
38 {
39 .name = "LDO_LIM",
40 .start = DA9063_IRQ_LDO_LIM,
41 .end = DA9063_IRQ_LDO_LIM,
42 .flags = IORESOURCE_IRQ,
43 },
44};
45
46static struct resource da9063_rtc_resources[] = {
47 {
48 .name = "ALARM",
49 .start = DA9063_IRQ_ALARM,
50 .end = DA9063_IRQ_ALARM,
51 .flags = IORESOURCE_IRQ,
52 },
53 {
54 .name = "TICK",
55 .start = DA9063_IRQ_TICK,
56 .end = DA9063_IRQ_TICK,
57 .flags = IORESOURCE_IRQ,
58 }
59};
60
61static struct resource da9063_onkey_resources[] = {
62 {
63 .name = "ONKEY",
64 .start = DA9063_IRQ_ONKEY,
65 .end = DA9063_IRQ_ONKEY,
66 .flags = IORESOURCE_IRQ,
67 },
68};
69
70static struct resource da9063_hwmon_resources[] = {
71 {
72 .start = DA9063_IRQ_ADC_RDY,
73 .end = DA9063_IRQ_ADC_RDY,
74 .flags = IORESOURCE_IRQ,
75 },
76};
77
78
79static const struct mfd_cell da9063_common_devs[] = {
80 {
81 .name = DA9063_DRVNAME_REGULATORS,
82 .num_resources = ARRAY_SIZE(da9063_regulators_resources),
83 .resources = da9063_regulators_resources,
84 },
85 {
86 .name = DA9063_DRVNAME_LEDS,
87 },
88 {
89 .name = DA9063_DRVNAME_WATCHDOG,
90 .of_compatible = "dlg,da9063-watchdog",
91 },
92 {
93 .name = DA9063_DRVNAME_HWMON,
94 .num_resources = ARRAY_SIZE(da9063_hwmon_resources),
95 .resources = da9063_hwmon_resources,
96 },
97 {
98 .name = DA9063_DRVNAME_ONKEY,
99 .num_resources = ARRAY_SIZE(da9063_onkey_resources),
100 .resources = da9063_onkey_resources,
101 .of_compatible = "dlg,da9063-onkey",
102 },
103 {
104 .name = DA9063_DRVNAME_VIBRATION,
105 },
106};
107
108/* Only present on DA9063 , not on DA9063L */
109static const struct mfd_cell da9063_devs[] = {
110 {
111 .name = DA9063_DRVNAME_RTC,
112 .num_resources = ARRAY_SIZE(da9063_rtc_resources),
113 .resources = da9063_rtc_resources,
114 .of_compatible = "dlg,da9063-rtc",
115 },
116};
117
118static int da9063_clear_fault_log(struct da9063 *da9063)
119{
120 int ret = 0;
121 int fault_log = 0;
122
123 ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
124 if (ret < 0) {
125 dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
126 return -EIO;
127 }
128
129 if (fault_log) {
130 if (fault_log & DA9063_TWD_ERROR)
131 dev_dbg(da9063->dev,
132 "Fault log entry detected: DA9063_TWD_ERROR\n");
133 if (fault_log & DA9063_POR)
134 dev_dbg(da9063->dev,
135 "Fault log entry detected: DA9063_POR\n");
136 if (fault_log & DA9063_VDD_FAULT)
137 dev_dbg(da9063->dev,
138 "Fault log entry detected: DA9063_VDD_FAULT\n");
139 if (fault_log & DA9063_VDD_START)
140 dev_dbg(da9063->dev,
141 "Fault log entry detected: DA9063_VDD_START\n");
142 if (fault_log & DA9063_TEMP_CRIT)
143 dev_dbg(da9063->dev,
144 "Fault log entry detected: DA9063_TEMP_CRIT\n");
145 if (fault_log & DA9063_KEY_RESET)
146 dev_dbg(da9063->dev,
147 "Fault log entry detected: DA9063_KEY_RESET\n");
148 if (fault_log & DA9063_NSHUTDOWN)
149 dev_dbg(da9063->dev,
150 "Fault log entry detected: DA9063_NSHUTDOWN\n");
151 if (fault_log & DA9063_WAIT_SHUT)
152 dev_dbg(da9063->dev,
153 "Fault log entry detected: DA9063_WAIT_SHUT\n");
154 }
155
156 ret = regmap_write(da9063->regmap,
157 DA9063_REG_FAULT_LOG,
158 fault_log);
159 if (ret < 0)
160 dev_err(da9063->dev,
161 "Cannot reset FAULT_LOG values %d\n", ret);
162
163 return ret;
164}
165
166int da9063_device_init(struct da9063 *da9063, unsigned int irq)
167{
168 struct da9063_pdata *pdata = da9063->dev->platform_data;
169 int model, variant_id, variant_code;
170 int ret;
171
172 ret = da9063_clear_fault_log(da9063);
173 if (ret < 0)
174 dev_err(da9063->dev, "Cannot clear fault log\n");
175
176 if (pdata) {
177 da9063->flags = pdata->flags;
178 da9063->irq_base = pdata->irq_base;
179 } else {
180 da9063->flags = 0;
181 da9063->irq_base = -1;
182 }
183 da9063->chip_irq = irq;
184
185 if (pdata && pdata->init != NULL) {
186 ret = pdata->init(da9063);
187 if (ret != 0) {
188 dev_err(da9063->dev,
189 "Platform initialization failed.\n");
190 return ret;
191 }
192 }
193
194 ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
195 if (ret < 0) {
196 dev_err(da9063->dev, "Cannot read chip model id.\n");
197 return -EIO;
198 }
199 if (model != PMIC_CHIP_ID_DA9063) {
200 dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
201 return -ENODEV;
202 }
203
204 ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
205 if (ret < 0) {
206 dev_err(da9063->dev, "Cannot read chip variant id.\n");
207 return -EIO;
208 }
209
210 variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
211
212 dev_info(da9063->dev,
213 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
214 model, variant_id);
215
216 if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
217 dev_err(da9063->dev,
218 "Cannot support variant code: 0x%02X\n", variant_code);
219 return -ENODEV;
220 }
221
222 da9063->variant_code = variant_code;
223
224 ret = da9063_irq_init(da9063);
225 if (ret) {
226 dev_err(da9063->dev, "Cannot initialize interrupts.\n");
227 return ret;
228 }
229
230 da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
231
232 ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
233 da9063_common_devs,
234 ARRAY_SIZE(da9063_common_devs),
235 NULL, da9063->irq_base, NULL);
236 if (ret) {
237 dev_err(da9063->dev, "Failed to add child devices\n");
238 return ret;
239 }
240
241 if (da9063->type == PMIC_TYPE_DA9063) {
242 ret = devm_mfd_add_devices(da9063->dev, PLATFORM_DEVID_NONE,
243 da9063_devs, ARRAY_SIZE(da9063_devs),
244 NULL, da9063->irq_base, NULL);
245 if (ret) {
246 dev_err(da9063->dev, "Failed to add child devices\n");
247 return ret;
248 }
249 }
250
251 return ret;
252}
253
254MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
255MODULE_AUTHOR("Krystian Garbaciak");
256MODULE_AUTHOR("Michal Hajduk");
257MODULE_LICENSE("GPL");
258